Improvement in machinery for coiling springs



UNITED Sfrarns 'PATENT Snaren -BICHD. ,VSE `AND WVM. TOSI-IACH, OF NEW YORK, N. Y.

IMPRVENENT `IN MACHINERY FOR COILING SPRINGS.

Specification forming parrtof Letters Patent No. 5S, 156, dated September 18, 1866.

To all whom it may concern:

Beit known that we, RICHARD VosE and` WILLIAM TosHAoH, of the city, county, and State of N ew York, have invented certain new and useful Improvements in Spiral-Sprin g- ()oiling Machines; and We do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specilication, and in which- Figure l is afront elevation of our improved spiral-spring-coiling machine; Fig. 2, a plan or top View of the same. Fig. 3, a perspective view of our tapering guide-plate detached; and Fig. 4, a top view of the revolving mandrel detached, showing a portion of the frame .and illustrating the position of the tapering guide-plate.

Similar letters indicate like parts in all of the figures.

y The nature of our invention consists in they construction of a machine for forming metallic spiral coils by the combination" of one or more swaging-wheels and pressure-rollers with a central revolving mandrel, and with anjnclined or tapering guide-plate partially inclosing said mandrel, or with suitably-arranged rollers, so inclined as to act as the equivalent of such guide-plate.

We use in the simplest form of our improved spiral-spring'coiling machine three parallel shafts, AB C, placed as nearly as possible equidistant from each other around a central shaft, D, carrying the mandrel. These shafts are made short, and revolve in suitable bearings formed in two upright supports, E E', secured to a solid bed-plate, F. To give additional steadiness and security to the operation of the machine, the main drivingshaftGrand the mandrel-shaft D are extended out through bearings in a third upright, E, as seen in Fig. 2.

Upon the outer end of the shaft D, projecting through its bearings in the upright E, is secured acylindrical mandrel, D', of the diameter required in the spiral coil to be formed thereon. The end of the upper shaft, A, immediately over the mandrel D', is provided with a grooved roller or swaging-wheel, a, of a diameter equal to that of the mandrel, while i he ends of the lower shafts,B and C, are made to form plain rollers of a diameter somewhat larger than that of the mandrel D". These roller-feeds of the shafts B and C are stayed by supportin g-bars V and W, as shown in Figs. l and 2; but the end ofthe mandrel is left free.

As the wear is greater upon the mandrel D and swaging-roller a than upon the rollers B and C, the former are made separate from the shafts, and, although securely attached thereto, may be removed therefrom, tobe repaired or replaced by others.

An additional grooved swagingwheel, 7L, of a diameter three or four times greater than that ofthe mandrel D, is placed in a right plane with the first swaging-wheel, a', in front thereof, being secured upon the end of the drivingshaft G, as clearly shown in Fig. 2 of the drawings. The interval between the circumference of each of the swaging-wheels and formingrollers and the central mandrel, D, is equal to the thickness of the `bar to be coiled. In or der, however, to give elasticity to thefpressure of the swaging-wheels upon the bar to be coiled the outer half of the journal-boxes at the end next the mandrel are made to slide in ways formed in suitable frames H and I, and are held closely in place by means of set-screws J and K, bearing upon said journal-boxes by means of intervening springs L and M. The pressure ofthe set-screws upon these powerful springs thus regulates the pressure to be exerted by the grooved swaging-wheels upon the bar to be coiled thereby.

The roller and mandrel shafts A, B, O, and D are all geared together by means of pinions a 0 p g, so meshing into each other as that they must all revolve in unison With equal velocity. Motion is imparted thereto by means of a large cog-wheel, B, upon the mainv shaft gearing therein.

lThe pitch of the spiral coil to be formed upon the mandrel Dl is defined and controlled by means of a semicylindrical guideplate, S, secured to a strong supporting-bar, T, so as to partially inclose the mandrel D, and whose edge is cut away at the angle required in the pitch of the coil. The grooves in the swagingwheels serve to hold the bar closely against the inclined edge ofthe guide-plate.

In place of a simple semi-cylindrical guideplate having an inclined edge to give the proper pitch to the coil, guide-rollers may be the coil, as illustrated in red lines, Fig. 1. As

the bar is drawn in and coiled the inclination of the guide-plate gradually works the coil off of the end ofthe mandrel D.

By the use of the above-described machine springs of any length or pitch may be made without the necessity of attaching the loar to the mandrel; and as a continuous motion is obtained, each spiral spring, when completely coiled, is carried from under the action of the rollers, and another immediatelyT commenced.

It is therefore obvious that, as one bar of metal is coiled and the end thereof leaves the space between the swinging-wheel and mandrel, another bar or rod may be immediately introduced, and so on continuously, no stoppage of' the machinery being required.

Having thus fully described our invention, ,l what we claim therein as new, and desire to secure by Letters Patent, is-

The inclined-edge stationary guide-plate S,

or its equivalent, in combination with the cylindrical mandrel D' and one or more swaging and forming wheels and rollers revolving in unison, all substantially in the manner and for the purpose herein set forth.

The foregoing specification of our improve- I ments in spiral-sprin g-coilin g machines signed by us this 9th day of December, A. D. 1865.

RIOHD. VOSE. WILLIAM TOSHAGH. In presence ofl ARTHUR I. MUNDY, R. R. Woon. 

